228 results about "Industrial fan" patented technology

The invention belongs to the field of intelligent manufacturing and engineering design, and particularly relates to an industrial fan structure optimization design method and system based on AI assistance. According to the method, structural components of an industrial fan are modeled into a multi-node topological structure, a dual-channel performance prediction model is constructed, and the mapping relation between the structure and the performance is accurately established. On the basis, a comprehensive objective function is constructed, a boundary penalty mechanism is introduced, a virtual input parameter space is constructed in combination with a structure disturbance sample, a strategy gradient optimization method is adopted to carry out structure search and iterative optimization, and finally a structure scheme meeting boundary conditions and optimal performance is screened out through simulation verification. The system module comprises structure modeling, model training, objective function construction, disturbance generation, optimization execution, simulation verification and result output, and has the advantages of high structure identification precision, high optimization efficiency, strong engineering adaptability and the like.

The utility model relates to the technical field of mine tunnel ventilation, and discloses ventilation, dust removal and purification equipment for a coal mine driving working face, which comprises a ventilation pipe. According to the ventilation, dust removal and purification equipment for the coal mine driving face, through the arrangement of the air suction assembly, the spraying assembly and the circulating assembly, during use, an industrial fan is started, the industrial fan rotates to suck air in a mine hole, and when the air enters a ventilation pipe, a first water pump is started; a first water pump conveys liquid in a water storage tank into a spraying pipe, an atomizing nozzle sprays out water in the spraying pipe, dust falling treatment is conducted on sucked air, the water and dust in the air are mixed and fall into a liquid storage tank, a filter screen filters the mixed liquid, a second water pump is started, and the water in the water storage tank is sprayed out. A second water pump pumps out the filtered water, and the filtered water is conveyed into a water storage tank through a water outlet pipe, so that the used water can be recycled, and certain water resources are saved.

The utility model relates to the technical field of power electronics, and discloses a variable-frequency and energy-saving industrial fan speed regulating device which comprises a heat dissipation mechanism, the heat dissipation mechanism comprises a second motor, the output end of the second motor is fixedly connected with a first heat dissipation fan, and the outer portion of the first heat dissipation fan is fixedly connected with heat dissipation fins. A second cooling fan is fixedly connected to the inner sides of the cooling fins, and the cooling fins are fixedly connected to the outer portion of the second cooling fan, namely the side, away from the first cooling fan, of the second cooling fan. According to the utility model, after the motor II is started, the cooling fan I and the cooling fan II are driven to operate, so that the air flow rate around the cooling fins is greatly increased, the heat dissipation is accelerated, the temperature of the speed regulation device is effectively reduced, the stable operation of the speed regulation device is ensured, the normal operation of the speed regulation device is ensured, and the plurality of cooling fans work simultaneously and synergistically, so that the cooling efficiency is greatly improved; the service life of the speed regulating device is prolonged and the equipment maintenance cost is reduced.

The present application belongs to the field of industrial fan, and relates to abnormality monitoring technology, which is used to solve the problem that the existing high static pressure axial flow fan and intelligent monitoring system cannot make decision analysis on abnormal treatment measures of the fan according to abnormal monitoring data, and specifically is a high static pressure axial flow fan and intelligent monitoring system, which comprises an intelligent monitoring platform, wherein the intelligent monitoring platform is communicatively connected with an operation monitoring module, a maintenance analysis module, an abnormality analysis module and a storage module; the operation monitoring module is used for monitoring and analyzing the operation state of the high static pressure axial flow fan; the high static pressure axial flow fan is marked as a monitoring object, a monitoring period is generated, and the monitoring period is divided into a plurality of monitoring time periods; the present application can monitor and analyze the operation state of the high static pressure axial flow fan, monitor the operation abnormality degree of the fan in the monitoring time period through the operation coefficient, mark the monitoring time period, and provide data support for maintenance necessity analysis and abnormality analysis.

1. The name of the design product: industrial fan (12025). 2. The use of the design product: used in new energy industry, industrial industry, server and frequency converter to adjust air flow. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The present invention discloses a variable cross-section turbulent flow fan blade for large-scale industry. The blade includes a hollow main body having an internal cavity, and further includes a solid turbulent flow wing connected to the rear side edge of the blade and extending along the root-tail direction of the rear side edge. At the rear side edge of the turbulent flow wing, there are turbulene teeth continuously distributed periodically along the root-tail direction. Each turbulene tooth at least includes a turbulent flow side extending along the root-tail direction and gradually narrowing towards the main body side. The blade of the present invention takes into account the large wind force gap between the root and the tail of the industrial fan and the discomfort problem of continuous wind blowing on people. It uses turbulent flow to simulate natural wind and balance the wind force gap inside and outside the center, truly solving the application pain points of industrial large fans, improving the large environment of the factory, and enhancing the comfort of the staff under the fan.

The invention belongs to the technical field of industrial fans, and discloses an automatic cleaning industrial fan which comprises a support, a transmission motor and a shell are fixedly connected to the support, the output end of the transmission motor penetrates into the shell and is fixedly connected with an impeller, and a mounting cylinder is fixedly mounted on the shell through bolts; the automatic cleaning piece is arranged in the shell; the automatic cleaning part comprises a double-shaft motor, the double-shaft motor is fixedly connected to the shell, and the top end of an output shaft of the double-shaft motor is fixedly connected with a worm. The double-shaft motor and the worm drive the worm gear, the toothed bar and the first reciprocating lead screw to rotate, so that the first reciprocating lead screw drives the flushing part to comprehensively flush the impeller, and it is ensured that the impeller is clean and free of dead corners; and meanwhile, the toothed bar drives the arc-shaped plate and the scraping plate to rotate through the toothed ring and the spring reset piece, the scraping plate scrapes off accumulated dust in the shell in a self-adaptive mode, the whole cleaning process does not need manual intervention, and the cleaning process can be automatically completed when the draught fan is not used.

The invention relates to an energy-saving industrial fan motor assembly which comprises a shaft rod, a rotor seat body and a stator seat body, the rotor seat body and the stator seat body are both installed on the shaft rod, the stator seat body comprises a stator seat ring body, stator seat supporting arms and a stator inner hole seat, and one ends of the stator seat supporting arms are distributed along the inner wall of the stator seat ring body. One end of the rotor seat supporting arm is distributed along the inner wall of the stator seat ring body, the other end of the rotor seat supporting arm is integrated on the outer end side of the rotor inner hole seat and is divided into a plurality of lower hollow channels, the rotor seat ring body is of an inner hollow structure, one end of the rotor seat supporting arm is distributed along the inner wall of the stator seat ring body, and the other end of the rotor seat supporting arm is integrated on the outer end side of the rotor inner hole seat and is divided into a plurality of upper hollow channels. A lamp lighting assembly is installed below the stator base body, and a lower air channel is formed between the lamp lighting assembly and the stator base ring body. The scheme realizes a directional convection heat dissipation path, accelerates the discharge of heat in the motor, and reduces the influence of temperature rise on the efficiency.

The utility model discloses an industrial large fan anti-falling fixing device which comprises a mounting plate, one side of the mounting plate is fixedly connected with a connecting frame, one side of the upper end of the connecting frame is fixedly connected with a first motor, the output end of the first motor is fixedly connected with a first rotating rod, and the first rotating rod is fixedly connected with a first rotating frame. The upper side and the lower side of the first rotating frame are fixedly connected with arc-shaped blocks, an arc-shaped groove is formed in the first rotating frame, the portions, located on the two sides of the arc-shaped groove, of the first rotating frame are fixedly connected with limiting plates, and one limiting plate is fixedly connected with a second motor. And then a second motor is matched with a second rotating rod to enable a second rotating frame to vertically swing, so that the large industrial fan achieves three-dimensional rotation, an arc-shaped block is connected with an arc-shaped protrusion, a pulley is matched with a pressing plate to provide support for the second rotating frame, and therefore the stability of the large industrial fan during rotation is improved, and the advantage of falling prevention is achieved.

The utility model relates to the technical field of industrial fan accessory equipment, in particular to an industrial fan rotating speed control device which comprises a substrate and a protective shell, a resistance adjusting assembly is arranged on the substrate, an adjusting knob used in cooperation with the resistance adjusting assembly is arranged on the protective shell, and the resistance of the resistance adjusting assembly is changed through the adjusting knob. The fan rotating speed adjusting device has the advantage of multi-gear adjustment, meanwhile, the position of the adjusting rod is limited through the guide seat, so that the fan rotating speed adjusting device is more stable during rotation, adapts to frequent rotation and does not deflect or misplace, and the conductive seat is installed at the end of the adjusting rod, so that the rotating speed of the fan is adjusted. The conductive blocks connected with the conductive seat are installed on the two sides of the resistance coil, so that direct contact between the conductive seat and the resistance coil is replaced, abrasion of the conductive seat in the using process can be relieved, and the service life of equipment is prolonged.

The invention relates to a wind gathering type industrial fan which comprises a shell, an axial flow fan rotationally arranged in the shell and a driving part for driving the axial flow fan to rotate, the shell comprises a straight barrel shell and a protective net cover, and the protective net cover is arranged on the air outlet side of the straight barrel shell; the fan further comprises a wind gathering cover arranged on the straight barrel shell, a through hole is formed in the middle of the wind gathering cover, the circumferential outer wall of the wind gathering cover is attached to the circumferential outer wall of the wind outlet side of the straight barrel shell, and the distance between the axis of an inner ring of the wind gathering cover and the axial flow fan is larger than that between an outer ring of the wind gathering cover and the axial flow fan. According to the device, wind is gathered, wind power is concentrated, air can be conveniently blown to a designated position, especially some specific devices needing heat dissipation in a plant, heat dissipation is more accurate after wind power is concentrated, the heat dissipation effect of the devices is good, and wind power waste is not likely to be caused. The distance between the axis of the inner ring of the wind gathering cover and the axial fan is larger than that between the outer ring of the wind gathering cover and the axial fan, so that diversion is formed, and wind power loss is reduced.

The utility model relates to an industrial fan which comprises a frame, a motor, a first belt wheel and a fan blade rotating mechanism, the frame is provided with an installation through hole, the installation through hole penetrates through the frame, and the fan blade rotating mechanism is installed in the installation through hole; the motor is provided with a rotating shaft, and the rotating shaft and the first belt wheel are fixedly connected together in a shaft hole connection mode. The fan blade rotating mechanism comprises a second belt wheel and a preset number of fan blades, and the first belt wheel and the second belt wheel are connected together through a transmission belt, so that the motor drives the second belt wheel to rotate, and the fan blades are driven to rotate.

An industrial structure for wind energy collection includes an industrial facility requiring ventilation and a ventilation opening. An industrial fan associated with the vent discharges exhaust gas forming an exhaust flow zone opposite the vent. The exhaust flow zone is defined by first and second boundaries extending from the industrial structure at first and second sides of the vent. At least one wind turbine is located outside the vent, including a turbine blade portion and a generator. The at least one wind turbine is positioned relative to the vent such that, during each rotational cycle, the blade portion lies partially within the exhaust flow zone across the first boundary and partially outside the exhaust flow zone.

The utility model provides a special frequency converter for an industrial fan, which comprises a heat dissipation frame, a fixing assembly is arranged on the surface of the heat dissipation frame, a flat copper pipe is arranged between a pressing seat I and a pressing seat II, and the pressing seat I and the pressing seat II are respectively pressed at two ends of a frequency converter body; according to the utility model, the heat dissipation frame is arranged on the back surface of the frequency converter, the heat dissipation frame is provided with a plurality of heat conduction fins, when the frequency converter is used, heat generated by the back surface of the frequency converter can be dissipated through the heat conduction fins, the outer side of the frequency converter is also provided with the pressing seat I, the pressing seat II and the flat copper pipe, and the frequency converter can be pressed and limited through the pressing seat I and the pressing seat II; meanwhile, the flat copper pipe is arranged around the outer ring of the frequency converter, the frequency converter can be protected, cooling liquid can be introduced into the first pressing base, the second pressing base and the flat copper pipe, rapid water cooling of the frequency converter can be achieved, heat generated around when the frequency converter works is taken away, and the heat dissipation effect is further improved.

The utility model relates to the technical field of automobile wind resistance testing, in particular to a simulated automobile wind resistance testing device which comprises a base, a sliding rail is arranged in the center of the top of the base through a reserved groove, a testing table is arranged at the top of the sliding rail, and a reference ruler is fixed to the side, corresponding to the sliding rail and the testing table, of the top of the base through bolts. An L-shaped bearing frame is arranged on one side of the base, a heavy-load electric cylinder is mounted at the top of the L-shaped bearing frame through bolts, a test cover covers the top of the base, and an industrial fan and a ventilation net cover are mounted in the centers of the surfaces of the two sides of the test cover through reserved openings and bolts respectively; the heavy-load electric cylinder drives the test cover to descend to cover the top of the base, so that an automobile stopping at the top of the test board is located in a simulated wind tunnel type cover body environment, the industrial fan is started to blow air to the automobile for wind resistance test, and airflow in the test cover is conveniently discharged through the ventilation mesh cover.

The present invention relates to the technical field of welding, and particularly relates to a welding fixture for an industrial fan impeller, which comprises a base and a working plate. The top of the base is fixedly connected with the working plate, and the working plate is a circular plate with a central opening. The welding fixture further comprises: a rotating ring rotatably installed on the outer edge of the top surface of the working plate, and a plurality of electric slide rails I are circumferentially and spacedly fixedly arranged on the top surface of the rotating ring; an inner ring plate rotatably assembled at the central opening of the rotating ring, and a plurality of electric slide rails II which are equal in number to the electric slide rails I are circumferentially and spacedly fixedly arranged on the top surface of the inner ring plate; and positioning and clamping members arranged on each of the electric slide rails I and the electric slide rails II. Through the mutual cooperation of the positioning and clamping members on the electric slide rails I and the electric slide rails II, the present invention can accurately position and clamp each blade, and perform fine adjustment through a cylinder and a bidirectional lead screw driven by a first motor, thereby effectively improving the accuracy of welding the blades on the chassis.

The present invention relates to the field of industrial equipment technology, and specifically to an industrial fan based on a low-speed, high-torque magnetically adjustable motor, the industrial fan comprising: a rotating assembly with an internal accommodation space, a magnetically adjustable motor arranged in the accommodation space, and fan blades fixed to the outside of the rotating assembly; the magnetically adjustable motor comprising: a motor stator and a motor rotor sleeved on the outside of the motor stator, an air gap formed between the motor stator and the motor rotor, the motor stator comprising a stator iron yoke, a coil winding wound on the stator iron yoke, and a stator magnetically adjustable block fixed to the end of the stator iron yoke, the motor rotor comprising a rotor iron yoke and a rotor permanent magnet assembly attached to the inner side of the rotor iron yoke, the stator magnetically adjustable block and the rotor permanent magnet assembly being radially magnetized. In the above manner, compared with traditional industrial fans, the present invention can directly output torque to drive the fan blades to operate, increase magnetic flux through the stator magnetically adjustable block, improve motor torque output, reduce mechanical loss, and improve motor efficiency.

The utility model relates to the technical field of industrial fans, and discloses a head shaking mechanism of an industrial fan, which comprises the industrial fan, a base, a supporting seat, a pulley, an annular seat, a mounting groove, a mounting shaft, a packaging groove, a built-in groove, a gear ring, an arc-shaped groove and a driving gear, an annular seat is integrally formed on the base, the bottom of the industrial fan is rotatably connected and matched with the interior of the mounting groove through a mounting shaft, when the servo motor is started, the driving gear is fixedly connected and matched with the annular seat, and when the servo motor is started, the driving gear is fixedly connected and matched with the annular seat. The servo motor can drive the driving gear in the arc-shaped groove to rotate through the driving shaft, teeth between the driving gear and the gear ring are meshed and matched, the gear ring can drive the industrial fan to conduct steering adjustment through the supporting piece along with driving of the driving gear, manual control and adjustment are not needed, and therefore the practical effect is improved.

1. Name of the product in this design: Industrial Fan. 2. Purpose of this design: for use in fans. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the key design points: Design 1 3D view. 5. Design 1 is designated as the basic design.

The invention discloses a non-inductive FOC starting method and system for a heavy-load industrial fan, and belongs to the technical field of motor control, and the method comprises the steps: carrying out the power-on initialization of a brushless motor of the heavy-load industrial fan, and completing the power supply and driving signal preparation; meanwhile, setting a plurality of frequency control variables for controlling the starting process, including open-loop final frequency, V / F frequency acceleration, given operation frequency, current closed-loop frequency and current closed-loop given current; thirdly, adopting a V / F starting mode, presetting relevant parameters, maintaining the constant ratio of voltage to frequency, driving the motor to accelerate to a current closed-loop frequency in an open-loop mode, then switching to a current closed-loop control mode, adjusting current through PI, generating an incremental angle based on the final frequency of V / F starting, and continuously dragging the motor to accelerate to the final open-loop frequency; and finally, when the motor reaches the final open-loop frequency, the closed-loop control of the non-inductive position observer is switched to, so that the heavy-load industrial fan stably runs.

The utility model discloses a waterproof control box structure for an industrial fan, a waterproof control box comprises a cover body and a box body which are connected with each other, and a sealing ring is arranged between the cover body and the box body; the sealing ring plays a primary waterproof role, and the waterproof performance between the two is enhanced, so that the product quality is improved, and the product service life is prolonged. The cover body is provided with a first annular coupling waterproof part, the box body is provided with a second annular coupling waterproof part, and the first annular coupling waterproof part and the second annular coupling waterproof part are movably inserted and matched, so that the waterproof effect is further improved, the product quality is further improved, and the service life of the product is prolonged.

The utility model discloses a cleaning device for a fan mesh enclosure, the device comprises a hollow load plate, the upper surface of the hollow load plate is fixedly connected with a support frame, the outer wall of the support frame is fixedly connected with a motor I, the output end of the motor I is rotatably connected in the support frame and is fixedly connected with a round box, and the round box is fixedly connected with a motor II. The end, away from the supporting frame, of the round box is rotationally connected with a first rotating column, the outer wall of the first rotating column is fixedly connected with a first gear, and the outer wall of the first rotating column is fixedly connected with a connecting frame. According to the device, through mutual cooperation of a first motor, a round box, a first rotating column, a first gear, a cleaning brush head, a second rotating column, a second gear, a third gear and a reciprocating rotating assembly, the cleaning brush head generates fixed swing while rotating in a large range, the fan mesh enclosure can be cleaned more comprehensively, the cleaning effect is good, and the practicability is high. And therefore, electrostatic accumulation caused by dust adsorption can be prevented, and the working efficiency of cleaning the fan mesh enclosure of the large industrial fan is greatly improved.

The invention discloses a stator encapsulation heat dissipation process for a high-power industrial fan permanent magnet motor, and the process is characterized in that the process comprises the following steps: S1, pretreatment: carrying out the cleaning, drying and preheating of a stator iron core of a permanent magnet motor and a winding embedded in the stator iron core; s2, assembling a mold: placing the pretreated stator assembly in a potting mold, and enabling an annular potting cavity to be formed between the outer circular surface of the stator core and the inner wall of the mold; s3, vacuum potting: in a vacuum environment, injecting a uniformly mixed liquid-state potting adhesive into the potting cavity until the potting adhesive completely covers the end part and the in-slot part of the winding; s4, step-by-step curing: carrying out step-by-step heating curing treatment on the stator assembly which is subjected to encapsulation to form a solid-sealed heat conductor which is tightly combined with the stator iron core and the winding; and S5, post-processing: after curing is completed, demolding is performed, and the surface of the stator is cleaned. Through the innovative structural design and process method, the heat dissipation efficiency, the mechanical reliability and the environmental tolerance are improved.

The utility model provides a drum-type powdered iron dehydrating and filtering device which comprises a supporting seat and an outer drum body, the outer drum body is fixed in the middle of the upper surface of the supporting seat, a servo motor and an industrial fan are fixed in the supporting seat, a sealing cover is rotatably connected to the upper portion of the back face of the outer drum body through a hinge, and a blocking ring is fixed to the upper portion of the inner wall of the outer drum body. A dewatering cylinder is embedded in the outer cylinder, a chassis plate is fixed to the lower portion of the interior of the dewatering cylinder, a limiting ring is fixed to the upper portion of the outer wall of the dewatering cylinder, an exhaust plate is embedded in the outer cylinder, a liquid drainage pipe is transversely embedded into the lower portion of the right side of the outer cylinder, and a fixing plate is fixed to the interior of the outer cylinder. When fine iron powder is dewatered and filtered, separated water can rapidly penetrate through the filtering holes to fall off, the situation that the fine iron powder is stacked on the outer sides of the filtering holes in the dewatering process to affect normal water separation is avoided, the dewatering and filtering effects are good, meanwhile, the dewatered fine iron powder can be rapidly dried, and use is more convenient.

The application relates to an industrial fan with fan blades convenient to install, which comprises a mounting seat and a plurality of fan blades, the mounting seat comprises a base and a top seat, the fan blades comprise a blade and a fixing column, a plurality of groups of connecting rods are circumferentially arranged on the base, the fixing column is arranged on the connecting rods, one group of connecting rods corresponds to one fan blade, a plurality of connecting holes are arranged at the end of the fixing column, the fixing column is arranged on the connecting rods through the connecting holes, and the base and the top seat are fixed through a fixing assembly. The application has the advantages that the fan blades are fast to install, the fan blades do not need to be installed and fixed through bolts, the industrial fan blades are convenient to install, the industrial fan is completed through fewer bolts or screw rods, and the industrial fan is fast to install as a whole.

The utility model belongs to the technical field of industrial fan, provide a air outlet structure and fan for fan, air outlet structure includes: support frame, air outlet body, its inside is provided with gas passage, gas passage includes the air inlet end and air outlet end that intercommunication, connecting piece, its fixed connection between support frame and air outlet body, wherein, air outlet body includes first outer surface and second outer surface, first outer surface and second outer surface smooth transition connection, connecting piece fixed setting in first outer surface end portion close to second outer surface. Compared with prior art, the utility model has through setting up air outlet body with the air inlet end and air outlet end of different flow cross section shape, can realize the smooth transition connection between fan air outlet and silencer air inlet, the first outer surface and second outer surface of air outlet body smooth transition, not only has strengthened structure integral strength, but also is favorable to the smooth flow of airflow, reduces the eddy current and resistance loss.

The application relates to an industrial fan with high safety, which comprises a mounting base and a plurality of connecting pieces, characterized in that a fan blade is arranged on the connecting piece, a plurality of limiting assemblies are arranged in one-to-one correspondence with the connecting pieces, the connecting piece is arranged on the mounting base through the limiting assembly, the limiting assembly comprises a first limiting block and a second limiting block, the first limiting block is arranged on the mounting base, the second limiting block is arranged on the side of the first limiting block away from the mounting base, a connecting hole for the connecting piece to pass through is arranged on the first limiting block and the second limiting block, a clamping block is arranged on the first limiting block, and a clamping groove for clamping the clamping block is arranged on the connecting piece. The application has the effects of firm installation of the connecting piece, no need of thread holes for connection, reduced maintenance and inspection, difficulty in damage of the connecting piece, and improved safety of the industrial fan.

The utility model belongs to the technical field of industrial fan production, and particularly relates to a fan production transfer device which comprises a fan body and four supporting legs evenly distributed and fixedly connected to the surface of the fan body, and further comprises a transfer assembly arranged below the fan body. The transfer assembly comprises a positioning shell arranged below the fan body, two positioning blocks are symmetrically arranged in the positioning shell, and two air cylinders are symmetrically and fixedly connected to the surface of the positioning shell through mounting bases. A linkage rod and an air cylinder are matched with each other, the fan body is supported, supporting legs are made to be away from the ground, the fan body is convenient to move, meanwhile, an auxiliary assembly is added, elastic sponge and a rubber pad can be matched, the elastic sponge can buffer the fan body due to the property of the material of the elastic sponge, and the fan body can be conveniently moved. Damage to a shell of the fan main body due to hard contact is prevented, friction to the fan main body can be increased by a rubber pad, and slipping when the fan main body is supported is prevented.

The invention belongs to the technical field of centrifugal fans, and particularly discloses a high-efficiency refrigeration industrial fan which comprises a volute, an air inlet and an air outlet, and the top and the front side of the volute are provided with an air outlet and an air inlet respectively; the rotating disc is rotationally mounted on the inner wall of the rear side of the volute, and a plurality of fan blades are annularly distributed on the front side of the rotating disc; the motor is installed on the rear side of the volute, and an output shaft of the motor is in transmission connection with the axis of the rotary disc. By means of the double protection design of the filtering assembly and the sealing mechanism, dust entering the volute is reduced from the source, the annular filter screen can preliminarily filter entering air, the sealing mechanism can automatically seal the rear end of the flow guide cover when the motor stops running, external dust is prevented from flowing backwards into the volute through the air inlet in the shutdown state, and the service life of the volute is prolonged. The problems of air volume and air pressure attenuation and vibration aggravation caused by the fact that dust is attached to an impeller of an existing industrial fan are effectively solved, and long-term stable operation of the fan is guaranteed.

This utility model discloses an industrial fan opening and closing adjustment mechanism, specifically relating to the field of ventilation machinery technology. It includes a mounting frame, with a first fixed frame and a second fixed frame fixedly welded to both sides of the mounting frame. Several first fixed plates are disposed between the first and second fixed frames. Multiple rotating rods are rotatably connected within the mounting frame. Closing blades are connected to the outer walls of the rotating rods. One end of a rotating rod passing through a first fixed plate is connected to a drive shaft. Two drive connecting rods are fixedly disposed on the outer wall of the drive shaft. A transmission bar is rotatably connected to both ends of each drive connecting rod. The remaining rotating rods have connecting shafts at their ends passing through the first fixed plates. Driven connecting rods are fixedly disposed on the outer wall of the connecting shafts. Two transmission bars are rotatably connected to multiple driven connecting rods via the connecting rotating shafts. Through the compact connection between the various components, the stability of the closing blades during opening and closing can be improved, thereby enhancing the opening and closing effect of the industrial fan.